News hit the wire that the NSA spies on virtually every cellphone users' location. A new report by the Washington Post claims that the NSA captures about 5 billion cellphone location records per day, so much that even the NSA doesn't have the proper tools to sift through it all.
That's not to say the agency hasn't been able to make "good" use of it with analytics programs, though.
One such program, ominously labeled Co-Traveler, allows the NSA to determine "behaviorally relevant relationships" based on data from signals intelligence activity designators (or sigads for short) located around the world, including one codenamed "Stormbrew." That's a lot of jargon for what are essentially data hubs that collect geolocation information down to the cell tower level. Co-Traveler can locate targets of interest based on cellphone users moving in tandem, even if they're unknown threats -- frequent meetups with an existing suspect could reveal a close associate, for instance.